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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
The accompanying table shows the manufacturer’s suggested retail price, the highway miles per gallon, and the weight for each case in two different samples of vehicles. The top half of the table shows a random sample of five models of family sedans (which rules out luxury cars, sports cars, and convertibles), and the bottom half shows a random sample of five models of sports utility vehicles.

a. Estimate the difference in mean model price between family sedans and SUVs in an approximate 95% confidence interval.
b. Estimate the difference in mean model weight between family sedans and SUVs in an approximate 95% confidence interval.
c. Estimate the difference in mean highway miles per gallon between models of family sedans and models of SUVs in an approximate 95% confidence interval.
d. In which of the confidence intervals above do you have the least “confidence”? Explain.
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